A virus is a little living entity that infects your body and produces a cold. When you get a cold virus, your body's immune system, which defends against illnesses, fights back. Your symptoms should disappear in a few weeks, as your immune system fights the illness. The situation differs for those with allergies. This response produces conventional symptoms such as a cough or a stuffy... https://www.imchospital.com.pk/blogs-detail/cold-flu-or-allergy-whats-the-difference